Omron VARISPEED L7 Manual page 224

Suit the PG Rotation Direction and Motor Rotation Direction (F1-05)
Parameter F1-05 can be used to change the encoder signal direction if it is wrong.
If F1-05 is set to 0 the inverter expects channel A to lead 90° before channel B (Sin-channel leads 90°
•
before Cos-channel on PG-F2 card) if a forward command is applied (FWD means counterclockwise rota-
tion seen from the shaft side).
If F1-05 is set to 1 the inverter expects channel B to lead 90° before channel B (Cos-channel leads 90°
•
before Sin-channel on PG-F2 card) if a forward command is applied.
If Closed Loop Vector Control for PM motors is used, an encoder offset autotuning must be per-
formed if parameter F1-05 is changed.
IMPORTANT
Setting PG Pulse Monitor Output Division Ratio (F1-06)
This function is enabled only when a PG-B2 speed feedback card is used. Set the division ratio for the PG
pulse monitor output. The set value is expressed as n for the higher place digit, and m for the two lower place
digits. The dividing ratio is calculated as follows:
Dividing ratio = (1 + n)/m (Setting range) n: 0 or 1, m: 1 to 32
F1-06 =
n m
The division ratio can be set within the following range: 1/32 ≤ F1-06 ≤ 1. For example, if the division ratio is
1/2 (set value 2), half of the number of pulses from the PG are output at the pulse monitor.
Setting Number of Gear Teeth Between PG and Motor (F1-12 and F1-13)
If there are gears between the motor and PG, the gear ratio can be set using F1-12 and F1-13.
When the number of gear teeth has been set, the number of motor rotations within the Inverter is calculated
using the following formula.
No. of motor rotations (r/min.) = No. of input pulses from PG × 60 / F1-01 × F1-13 (No. of gear teeth on PG
side) / F1-12 (No. of gear teeth on motor side)
Setting the Absolute Encoder Resolution (F1-21)
y
If a Hiperface encoder is used, the serial line resolution must be selected by parameter F1-21 according to
the encoder data sheet. The possible resolution setting depends on the encoder selection (n8-35=5):
y
Hiperface : 0, 1 or 2 (16384, 32768, 8192)
•
EnDat: 2 (fixed to 8192)
•
Setting the Magnet Position Offset (F1-22)
Parameter F1-22 can be used to set the offset between the magnet and the encoder zero position. The value is
automatically set during the PM motor autotuning or encoder offset auto tuning (refer to
Encoder Offset Tuning).
6
page 4-8, PM Motor
73
6-